Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __BTRFS_ORDERED_DATA__ |
| 20 | #define __BTRFS_ORDERED_DATA__ |
| 21 | |
| 22 | struct btrfs_ordered_inode_tree { |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 23 | struct mutex mutex; |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 24 | struct rb_root tree; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 25 | struct rb_node *last; |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 26 | }; |
| 27 | |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 28 | struct btrfs_sector_sum { |
| 29 | u64 offset; |
| 30 | u32 sum; |
| 31 | }; |
| 32 | |
| 33 | struct btrfs_ordered_sum { |
| 34 | u64 file_offset; |
| 35 | u64 len; |
| 36 | struct list_head list; |
| 37 | struct btrfs_sector_sum sums; |
| 38 | }; |
| 39 | |
| 40 | /* bits for the flags field */ |
| 41 | #define BTRFS_ORDERED_IO_DONE 0 /* set when all the pages are written */ |
| 42 | #define BTRFS_ORDERED_COMPLETE 1 /* set when removed from the tree */ |
| 43 | #define BTRFS_ORDERED_START 2 /* set when tree setup */ |
| 44 | |
| 45 | struct btrfs_ordered_extent { |
| 46 | u64 file_offset; |
| 47 | u64 start; |
| 48 | u64 len; |
| 49 | unsigned long flags; |
| 50 | atomic_t refs; |
| 51 | struct list_head list; |
| 52 | struct inode *inode; |
| 53 | wait_queue_head_t wait; |
| 54 | struct rb_node rb_node; |
| 55 | }; |
| 56 | |
| 57 | |
| 58 | static inline int btrfs_ordered_sum_size(struct btrfs_root *root, u64 bytes) |
| 59 | { |
| 60 | unsigned long num_sectors = (bytes + root->sectorsize - 1) / |
| 61 | root->sectorsize; |
| 62 | return sizeof(struct btrfs_ordered_sum) + |
| 63 | num_sectors * sizeof(struct btrfs_sector_sum); |
| 64 | } |
| 65 | |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 66 | static inline void |
| 67 | btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t) |
| 68 | { |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 69 | mutex_init(&t->mutex); |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 70 | t->tree.rb_node = NULL; |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 71 | t->last = NULL; |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 72 | } |
| 73 | |
Chris Mason | e6dcd2d | 2008-07-17 12:53:50 -0400 | [diff] [blame^] | 74 | int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry); |
| 75 | int btrfs_remove_ordered_extent(struct inode *inode, |
| 76 | struct btrfs_ordered_extent *entry); |
| 77 | int btrfs_dec_test_ordered_pending(struct inode *inode, |
| 78 | u64 file_offset, u64 io_size); |
| 79 | int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset, |
| 80 | u64 start, u64 len); |
| 81 | int btrfs_add_ordered_sum(struct inode *inode, struct btrfs_ordered_sum *sum); |
| 82 | struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode, |
| 83 | u64 file_offset); |
| 84 | void btrfs_wait_ordered_extent(struct inode *inode, |
| 85 | struct btrfs_ordered_extent *entry); |
| 86 | void btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len); |
| 87 | struct btrfs_ordered_extent * |
| 88 | btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset); |
| 89 | int btrfs_add_ordered_pending(struct inode *inode, |
| 90 | struct btrfs_ordered_extent *ordered, |
| 91 | u64 start, u64 len); |
Chris Mason | dc17ff8 | 2008-01-08 15:46:30 -0500 | [diff] [blame] | 92 | #endif |